Students take down one smiley face anytime they blurt out. Students can either get 3 blurts per day or week depending on your class - I think I would prefer individual student charts instead of having the whole class on display like this.
Put a class list (on cute paper, of course) in a picture frame. Use a dry-erase marker to mark students off of a list! Add a line at the top of the page to remind you what it is for. Field trip money, papers signed and returned, etc.